第三部分：阅读理解（共20小题，每小题2分，满分40分）
阅读下列短文，从每题所给的四个选项（ A、B、C、D ）中，选出最佳选项，并在答题卡上将该项涂黑。
A Businessman ordered ten goldsmiths to make ten coins each. Each coin was to weigh exactly ten gram of pure gold.
One of the goldsmiths was a bad man. He decided to cheat. He made all his coins one gram short. Now the businessman heard that one of them had cheated. He also heard that this man had made each of his coins one gram short.
The businessman was a clever person. He took a certain number of coins from each of the smiths, weighed them together once only and found their weight to be 540 grams. This was enough for him to find out which one of the goldsmiths had cheated.
1 The word “goldsmith” means .
A. a person named Smith who sells articles(物品) made of gold
B. a thief who steal gold
C. a worker who makes articles of gold
D. a person who works for the man named Smith
2 The businessman found the cheat by .
A. looking each man in the eye
B. weighing one coin after another
C. weighing coins
D. asking who hadn't made coins according to his request
3 In order to find the cheat, the businessman weighed coins altogether .
A. fifty B. fifty-four C. fifth-five D. sixty
4 Suppose the businessman took one coin from the first smith, two from the second,
and ten from the tenth, he found out that he goldsmith was the cheat.
A. first B. sixth C. ninth D. tenth